66results about How to "No corrosion problems" patented technology

The invention discloses a boiler-turbine coupled flue gas waste heat utilization system capable of preheating air based on condensed water, which belongs to the field of energy conservation of electric stations. The boiler-turbine coupled flue gas waste heat utilization system mainly comprises a main economizer, a main flue, a bypass flue, a confluence flue, a main air preheater, smoke water heat exchangers, a high-pressure heater, a low-pressure heater, a deaerator, a flue gas-air heater and a condensed water-air heater. Cold air is preheated by extracting low-temperature condensed water in some of thermodynamic systems and low-temperature flue gas of a boiler through utilizing the condensed water-air heater; a primary smoke water heat exchanger and a secondary smoke water heat exchanger are used for heating the feeding water and the condensed water so as to replace extraction steam, with higher pressure, of a steam turbine. According to the flue gas waste heat utilization system, waste heat is effectively utilized, and the air is preheated by utilizing the low-level condensed water and the low-temperature flue gas of the boiler, so that the high-pressure extraction steam used for heat return is saved, thus work of a machine set is remarkably increased, and deep energy conservation and consumption reduction of a coal-fired generator set can be realized; furthermore, a problem of low-temperature corrosion of a waste heat utilization heating surface is relieved, and remarkable economic benefit is obtained.

The invention belongs to the technical field of catalysis, and relates to a preparation method of a catalyst for hexone synthesis by acetone hydrogenation and an application; the catalyst is composed of active component nickel loaded on an alumina carrier modified by transition metal oxides. The preparation method of the catalyst comprises two procedures: the first one is that transition metal oxides and alumina are mixed, molded, dried, roasted, and subject to hydro-thermal treatment, and the active component Ni is immersed to obtain the catalyst; the second one is that an alumina carrier is prepared firstly, then transition metal oxides and Ni are introduced by an immersion method, and finally hydro-thermal treatment is performed to obtain the catalyst. The catalyst of the invention adopts non-noble metal as the main active component, is simple in preparation, low in cost, strong in raw material adaptability, long in service life, and high in activity and selectivity, and combines three catalytic functions of acetone condensation, dehydration, and hydrogenation as a whole, and the reaction process flow is simplified greatly.

The invention belongs to the field of engineering structures, and particularly relates to a novel FRP (fiber reinforced plastic)-steel tube-epoxy resin-sea sand concrete compression member. The member is characterized in that an epoxy resin layer is coated on the inner surface of a steel tube, and the steel tube is internally filled with sea sand concrete; an FRP material layer is overwrapped on the outer surface of the steel tube; because the FRP material layer is overwrapped outside the steel tube, and the steel tube is prevented from being in direct contact with the external environment, so that the durability of the steel tube is improved obviously; meanwhile the epoxy resin layer is coated on the inner surface of the steel tube, so that the sea sand concrete and the steel tube are isolated, and the corrosion effect of chloride ions in sea sand on the steel tube is avoided; and the potential safety hazards of the sea sand concrete are reduced, and the application of the sea sand concrete is promoted. The member is applied to high-corrosion coastal and offshore areas and the like, bears the load mainly focused on axle load, and has favorable economical and environmental benefits.

The invention discloses a method for welding a cylindrical shell of a water heater. The method comprises the following steps of: preparing a cylinder body which has a shape of a circular pipe, preparing a sealing cover of which bottom edge has a shape matched with that of an end edge of the cylinder body, butting the sealing cover in a mode that the bottom edge faces the end of the cylinder body, arranging a placement tool on the inner sides of the end edge of the cylinder body and the bottom edge of the sealing cover in a detachable way, recessing a casting channel corresponding to the gaps of the sealing cover and the bottom edge on the outer circumferential surface of the placement tool, welding along the butting part of the sealing cover and the end edge of the cylinder body to ensure that a welding point is connected with the bottom edge of the sealing cover, and the end edge of the cylinder body in a melting way and is cast in the casting channel so as to form an inner welding pass; and by the welding means, an outer welding pass and the inner welding pass which have the supporting function can be formed on the outer and inner sides of the welding part of the sealing cover and the cylinder body respectively to ensure that weak points around the welding part are avoided, the cylindrical shell of the water heater, which is manufactured by welding can bear larger pressure, the inner and outer complete butting melting way is adopted by the welding part of the sealing cover and the end edge of the cylinder body and seams are avoided, and the corrosion, and change of electrical and chemical performance are avoided when water is filled in a cylinder.

The invention discloses a plasma etching residual washing liquid which contains hydroxylamine and derivate thereof, solvent, water and chelating agent. The plasma etching residual washing liquid is characterized by also comprising carboxylic polymer and polymer containing paint affinity groups and is compounded by the carboxylic polymer and the polymer containing paint affinity groups, thereby radically solving the problem of metal corrosion, particularly aluminum corrosion caused by rinsing with water during the washing in a wet method washing of the traditional hydroxylamine washing liquid in a process of semiconductor manufacture and omitting the solvent rinsing for avoiding the metal corrosion after the washing by the transitional hydroxylamine washing liquid. The invention keeps stronger washing property of the prior hydroxylamine washing liquid, causes metal corrosion, particularly aluminum corrosion resulted from direct washing by water after the washing of wafer, can remove the solvent washing procedure after the removal of plasma etching residual, and is beneficial to reduce the pollution and lower the cost.

The present invention discloses a limestone-gypsum wet flue gas desulfurization synergist, which comprises, by weight, 70-90 parts of an organic acid salt, 5-20 parts of an organic anhydride, and 5-15 parts of a surfactant. According to the present invention, the type of the component of the desulfurization synergist is simplified while the obtained synergetic desulfurization effect is good; due to the excellent and stable desulfurization effect, under the same conditions, the used raw materials are less, the production cost of the enterprise is low, and the performance price ratio is high; and the sodium diacetate accounting for the absolute proportion in the desulfurization synergist components is the internationally-recognized efficient, safe and inexpensive food additive, and has characteristics of good safety and good environmental protection during the production process, the storage and transportation process, the use process and other processes.

The invention provides a seawater desalination method for an integrated membrane process and belongs to a water desalination technology. Aiming at the defects of high investment, high pressure, high energy consumption and the like in an existing membrane-method seawater desalination process, 'nanofiltration/electrodialysis reversal' is taken as a core desalination process, wherein during nanofiltration, a high-desalination nanofiltration membrane with desalination ratio of 90% is adopted; during electrodialysis reversal, a thin-type electrode chamber is filled with a multistage multi-section energy-saving electroosmosis device provided with mixed-bed ion exchange resin. Seawater raw water is sequentially pretreated by virtue of a coagulative precipitation tank, a settling tank, a sand filter and an ultrafiltration membrane, and then is subjected to graded desaltination sequentially by virtue of a nanofiltration desalination device with an energy recovery device, and an energy-saving frequent electrodialysis reversal device; nanofiltration and energy-saving electrodialysis are respectively performed at low operation pressures which do not exceed 3.8MPa and 0.4MPa; the salt content of water produced by the system is 80-250mg/L, the total desalinization ratio can be mechanically regulated within a range of 99-99.75%, the body power consumption of per ton of water does not exceed 2.15KWh/m<3>, the investment and energy consumption of the whole seawater desalination process are obviously reduced, and the process operation is relatively safe and stable.

The invention consists of an oil-free air compressor, an ice-ball cold-storage heat exchanger, an ice-storage tank, an ice-making system, a gas heater, a multi-functional cooling tower, an outdoor unit, a room unit, a winter-summer switcher and an adjustable timing change valve. The air intake duct of the oil-free air compressor is jointed on the top of the multi-functional cooling tower to absorb the cleaned air in the cooling tower and connected to the winter-summer switcher through the exhaust port of the compressor. In winter high temp. and pressure air is fed to the gas heater and then fed to the outdoor unit for heating and the heater air is fed again to the room unit for rising temp.. In summer the ice-ball cold-storage heat exchanger works and the output cold air is fed to the outdoor unit of the branch air pipe through the main pipeline and then fed again to the room unit for lowering temp. after separating of cold and hot air.

The invention discloses a desulfurization wastewater treatment method, and belongs to the field of desulfurization wastewater treatment. A hot air unit introduces hot air into a phase change generator; meanwhile, a wastewater system conveys desulfurization wastewater to an atomizer in the phase change generator for atomization, hot wind formed by the desulfurization wastewater and the hot air is changed into a gas phase from a liquid phase through mass and heat exchange and the gas phase is discharged from an outlet of the phase change generator along with the hot wind; a solid formed by impurity crystal in the desulfurization wastewater enters the hot air unit at a solid outlet of the phase change generator under the action of gravity. According to the desulfurization wastewater treatment method, hot air in the phase change generator and atomized desulfurization wastewater drops are subjected to mass and heat exchange, and the desulfurization wastewater drops are evaporated and crystallized and then subjected to gas-solid separation. The problems that an original desulfurization balance is broken and equipment corrosion is caused in the desulfurization wastewater treatment process in a flue are solved, so that zero pollution and zero emission of the desulfurization wastewater are achieved.

The invention discloses a wall installation structure and an installation method thereof. The wall installation structure comprises a wall (2) and a wall connection clamping part (4), wherein the wall (2) is installed between a wall top installation component (1) and a wall bottom foundation component (3). The wall is hollow and comprises two side wallboards (21), the wall connection clamping part is a plate part, and a connecting part and two clamping connection parts clamped with the wallboards on the two sides respectively are formed on the plate part. Each clamping connection part comprises an end face plate (41) and a side face plate (42) which are perpendicular to each other. The wall connection clamping part is clamped between the two wallboards; the side face plates are clamped on the inner wall surfaces of the wallboards, the bottom surfaces of the end face plates are attached to the end faces of the wallboards, and the connecting part is formed between the two clamping connection parts or is formed on epitaxial plates (40) of the end plates. During installation, people only need to buckle the clamping connection parts of the wall connection clamping part to the end of the wall, and the clamping connection parts are connected with the wall top installation component and/or the wall bottom foundation component through the connecting part so that the installation operation efficiency can be improved, and the operation process can be simplified.

The invention discloses a method for recycling reclaimed water in a circulating cooling water system. The method comprises the following steps: (1) adding lime to the reclaimed water to carry out softening treatment and then carrying out solid-liquid separation; (2) adding borate corrosion inhibitors to the reclaimed water obtained after solid-liquid separation in the step (1); (3) adding the reclaimed water to which the borate corrosion inhibitors are added in the step (2) to circulating cooling water of the circulating cooling water system as replenished water of circulating cooling water; (4) adding polymer scale inhibitors and dispersants to the circulating cooling water to which the reclaimed water is added in the step (3). By adopting the method provided by the invention, safety of reclaimed water transport can be guaranteed, the circulating cooling water treatment difficulty is reduced and introduction of phosphorus is avoided in the whole process.

The invention discloses an aluminum ion battery using liquid metal gallium as a negative electrode, which belongs to the field of electrochemical batteries. The battery is characterized by comprising a liquid gallium negative electrode with the purity of 99.9% to 99.999%, a positive electrode, an aluminum chloride and inorganic acid salt electrolyte and a separator selected according to specific situations. The liquid metal gallium is directly placed on the bottom layer of the battery as a negative electrode or placed in a crucible as a negative electrode. A solid conductive material is used as the lead of the liquid gallium negative electrode. During the charging process, aluminum ions are reduced to aluminum atoms on the surface of the liquid gallium negative electrode and dissolved and diffused into the liquid gallium body phase. During the discharging process, the aluminum atoms dissolved in the liquid gallium are diffused to the surface of the gallium and are oxidized to the aluminum ions to enter the electrolyte. The charging and discharging voltage range is 0.1 to 2.4 V, and the current density range is 0.01 to 10 Ag<-1>. The liquid gallium negative electrode adopted in the invention has the characteristics of corrosion resistance, inhibition of Al dendrites and recycling. The aluminum ion battery based on the negative electrode has the advantages of long cycle life, high energy density, safety and stability, and can be used for large-scale energy storage or automobile power batteries.

The invention relates to the technical field of cleaning supplies and in particular to a clean aerosol composition suitable for a screen window, a filter screen and the like and a method for preparingaerosol by using the clean aerosol composition. The aerosol can form abundant foam at the moment of spraying a feed liquid, and the foam is extremely easily intercepted by the screen window during being sprayed towards the screen window and can be used for uniformly covering the surface of the screen window; and meanwhile, the foam sufficiently acts on dust on the surface of the screen window, sothat the dust originally attached to the surface of the screen window is floated on the surface of the foam by virtue of the self-cleaning capacity of the foam and microvibration caused during foam breakdown. By using the aerosol provided by the invention, a user only needs to uniformly spray the aerosol on the surface of the screen window and wipe the surface of the screen window by using a drywiping towel, a scouring pad or an analogue thereof after the foam is eliminated, and the problems that a common cleaning screen window needs to be dismounted, a mist of a common cleaning liquid directly penetrates through the screen window and the screen window is required to be cleaned by using a great deal of water after being cleaned are solved.

The invention provides a copper steel composite material for a seawater enclosing aquaculture fishing net. The outer layer of the copper steel composite material is a copper alloy layer; the core part of the copper steel composite material is steel; a cementing layer is arranged between the core part and the copper alloy layer; the thickness of the copper alloy layer is 1 to 3mm; the mass percent of the copper in the copper alloy layer is at least 70 percent or above; the strength of the steel is greater than 600 MPa; the material of the cementing layer is epoxy resin or phenolic resin; the thickness of the cementing layer is 10 to 30 micron. The invention also provides a manufacturing method for the copper steel composite material for the seawater enclosing aquaculture fishing net. According to the copper steel composite material for the seawater enclosing aquaculture fishing net and the manufacturing method for the copper steel composite material, the copper and the steel are compounded, and the copper alloy coats the surface layer of the steel, so that the advantages of the corrosion resistance and the biofouling preventing property of the copper alloy can be fully played; the core part is made of the steel with high strength, so that the advantages of high mechanical properties of the steel are fully played; the steel and the copper are combined, so that the requirements on the fishing net materials of sea farming can be met better; the steel is coated with the copper, so that the steel is not exposed in seawater, and the problem of corrosion is avoided.

The invention discloses a real-time automatic monitoring device for a salt mist sedimentation rate, and relates to the technical field of salt mist environment simulation test measurement. The device comprises a salt solution collecting device, a salt solution emptying device, a magnetic liquid level sensor, a protective shell, a data transmission cable and an upper computer. By utilizing the siphoning effect, when the amount of a solution in the salt solution collecting device reaches a certain value, all the solution is automatically emptied, a discharge electromagnetic valve is prevented from being introduced, and the failure rate of the device is reduced. A digital circuit signal is triggered by magnetic field induction, so that contact between device parts and a salt mist environment is avoided, the service life of the device parts is prolonged, the liquid level of a collected salt solution can be monitored in real time, the signal is processed and calculated through the upper computer, a sedimentation rate curve is drawn, automatic real-time monitoring of the salt mist sedimentation rate is realized, and the device is accurate and high in timeliness. The device is simple in structural design, high in automation degree, high in safety, long in service life and high in expansibility.